Merge #135

135: Add a note about the secret type bug r=anguslees a=johnraz

I just got bitten by the bug in #86 and #92 and lost quite a bit of time finding out what was happening.
This will hopefully help other people figure it out faster until the proper fix is released.

Co-authored-by: Jonathan Liuti <liuti.john@gmail.com>

README.md

@@ -168,6 +168,8 @@ the generic documentation for more information on the process.
 
 ## Usage
 
+**WARNING**: A bug in the current version is limiting secrets to use the "opaque" type. If you need to use another secret type (eg: `kubernetes.io/dockerconfigjson`), please use kubeseal from release 0.5.1 until [#86](https://github.com/bitnami-labs/sealed-secrets/issues/86) and [#92](https://github.com/bitnami-labs/sealed-secrets/issues/92) are resolved.
+
 ```sh
 # Create a json/yaml-encoded Secret somehow:
 # (note use of `--dry-run` - this is just a local file!)